Can you buy an iPhone with Vodafone as your service provider?

I live in Spain and want to buy an iPhone on the Vodafone network in Spain.

iPhones are locked wherever they come from. For Europe's O2. For Spain, I'm not sure. But in any case, you can still buy the iPhone unlock and then use a SIM card from any carrier you want.

One finger signal loss (Vodafone Spain) – deathgrip is NOT the problem